Acoustic Integrity Codes: Secure Device Pairing Using Short-Range Acoustic Communication

Secure Device Pairing (SDP) relies on an out-of-band channel to authenticate devices. This requires a common hardware interface, which limits the use of existing SDP systems. We propose to use short-range acoustic communication for the initial pairing. Audio hardware is commonly available on existing off-the-shelf devices and can be accessed from user space without requiring firmware or hardware modifications. We improve upon previous approaches by designing Acoustic Integrity Codes (AICs): a modulation scheme that provides message authentication on the acoustic physical layer. We analyze their security and demonstrate that we can defend against signal cancellation attacks by designing signals with low autocorrelation. Our system can detect overshadowing attacks using a ternary decision function with a threshold. In our evaluation of this SDP scheme's security and robustness, we achieve a bit error ratio below 0.1% for a net bit rate of 100 bps with a signal-to-noise ratio (SNR) of 14 dB. Using our open-source proof-of-concept implementation on Android smartphones, we demonstrate pairing between different smartphone models.Comment: 11 pages, 11 figures. Published at ACM WiSec 2020 (13th ACM Conference on Security and Privacy in Wireless and Mobile Networks). Updated reference

Student Behavior Ratings and Response to Tier 1 Reading Intervention: Which Students Do Not Benefit?

Core reading instruction and interventions have differential effects based on student characteristics such as cognitive ability and pre-intervention skill level. Evidence for differential effect based on affective characteristics is scant and ambiguous; however, students with problem behavior are more often non-responsive to core reading instruction and intensive reading interventions. In this study, we estimated the range of students\u27 behavior ratings in which a core reading instruction intervention was effective using a data set including 3,024 students in K-3. Data came from seven independent studies evaluating the individualized Student Instruction (ISI) Tier 1 reading intervention and were pooled using integrative data analysis. We estimated Johnson-Neyman intervals of student behavior ratings that showed a treatment effect both at the within and between classroom level. ISI was effective in improving reading scores (b = 0.51, p = .020, d = 0.08). However, students with very low or very high behavior ratings did not benefit from the approaches (range of behavior rating factor scores: -0.95-2.87). At the classroom level, students in classrooms with a higher average of problem behaviors did not benefit from ISI (average classroom behavior rating factor score: 0.05-4.25). Results suggest differentiating instruction alone is not enough for students with behavior problems to grow in reading ability

AICPA Committee Handbook for 2005

https://egrove.olemiss.edu/aicpa_comm/1214/thumbnail.jp

Service-Learning with College Students toward Health-Care of Older Adults: A Systematic Review

Service-Learning (SL) has become a teaching methodology that promotes social and personal skills while helping groups in need and at risk of social exclusion. This paper is a systematic review of the literature on SL experiences and research on college subjects in the area of health-care promotion in settings for older adults. After an exhaustive search, 43 peer-reviewed publications were classified according to frequency and geographical distribution, sample and duration of the programs, research methodologies, data collection instruments used, and main outcomes investigated. The results indicate that the research methodologies used tended to be qualitative and mixed, while the variety of samples and duration of interventions was very broad. The instruments used were mainly interviews and questionnaires, and the programs were developed specially in the United States of America. The groups receiving most SL were healthy older adults and older adult populations with aging disabilities and illnesses. The articles in the present review highlight that SL can have a positive effect on older adults’ health promotion and can enhance their community participation.This research was supported by the University of Granada, Plan FIDO 2018, Quality and Innovation Unit, project nº572, and call of micro-project by “UGR-Solidarity” area, 201

University of Illinois at Urbana-Champaign basketball guide 1993-1994

Title from cover.Description based on: 1989-90.Latest issue consulted 2006-2007